<template>
  <div class="icons">
    <swiper :options="swiperOption">
      <swiper-slide v-for="(page,index) of pages" :key='index'>
        <div class="icon" v-for="item of page" :key='item.id'>
          <div class="icon-img">
            <img class="icon-img-content" :src='item.imgUrl'>
          </div>
          <p class="icon-desc">{{item.desc}}</p>
        </div>
      </swiper-slide>
    </swiper>
  </div>
</template>

<script>
export default {
  name:'HomeIcons',
  props:{
    list:Array
  },
  data () {
    return {
      swiperOption:{
        autoplay: false
      }
    }
  },
  computed:{
    pages () {
      // 最终分页结果
      const pages = []
      // 遍历icon列表
      this.list.forEach((item, index) => {
        // 每8条为一页；例：0-7为第一页
        // page为当前页码；
        const page = Math.floor(index / 8)
        // 判断pages中当前页的存储数组是否已声明，未声明则声明当前页为数组格式；
        if (!pages[page]){
          pages[page] = []
        }
        // 将当前icon信息放入对应的页码数组中；
        pages[page].push(item)
      })
      // 返回分页之后的icon集合；
      return pages
    }
  }
}
</script>

<style lang="stylus" scoped>
  .icons >>> .swiper-container
    height :0
    padding-bottom :50%
  .icons
    margin-top :.1rem
    .icon
      position: relative
      overflow: hidden
      float: left
      width: 25%
      height: 0
      padding-bottom 25%
      .icon-img
        position: absolute
        top: 0
        left: 0
        right: 0
        bottom .44rem
        box-sizing :border-box
        padding :.1rem
        .icon-img-content
          display : block
          margin :0 auto 
          height: 100%
      .icon-desc
          position: absolute
          left :0
          right :0
          bottom :0
          height :.44rem
          line-height :.44rem
          color :#333
          text-align :center
          overflow: hidden
          white-space nowrap
          text-overflow :ellipsis



</style>

